The prisoner can ask his friend or relative to make a call and complete a kind of form or something that allows the cellphone to accept the incoming calls from a correctional institute. Not sure the process exactly, but it can be done.
The thing is that the person with the cell ohone would obviously know the person or else it wouldnt be added..
sccrbrs6, is this a new phone number that may have been recycled and the prisoner doesnt know that?
Dan, locally (for the most part) you can tell if its a cellphone just by the first three digits. Here, the prefixes 606, 957, 251, 638, 289 (and lots more) are cells. However with the new phone companies/cable companies/voip it is definitely harder to do so.